Papermaking compositions, process using same, and paper...

D - Textiles – Paper – 21 – H

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Details

D21H 17/07 (2006.01) C08L 1/02 (2006.01) C09D 7/12 (2006.01) C09D 101/02 (2006.01) D21H 17/14 (2006.01) D21H 17/66 (2006.01) D21H 17/68 (2006.01) D21H 21/16 (2006.01) D21H 21/24 (2006.01) D21H 21/30 (2006.01) D21H 23/06 (2006.01)

Patent

CA 2177255

A chemical composition for use in the papermaking process to produce a paper having enhanced characteristics of brightness, opaqueness, and sizing is provided. The process using the composition to make the paper and the paper made therefrom are also provided by the present invention. The composition employs a cationic softener base, such as the mono- and distearamides of aminoethylethanolamine, to enhance sizing, opacity and brightness. A surfactant such as an ethoxylated tallow amine or the reaction product of a saccharide and an acid, is used to ensure that the components of the composition remain dispersed therein and that the composition achieves uniform dispersibility on the paper. Another embodiment combines an amphoteric softener, such as a salt of an amphoteric stearic acid derivative, the cationic softener base, an acid, such as acetic acid, a surfactant, such as POE (15) tallow amine, carbamide, and water. To speed the production of the composition, a viscosity controlling agent, such as sodium chloride or sodium acetate, may be added thereto. The composition is added to pulp slurry during the papermaking process, and a paper made therefrom exhibits excellent qualities of brightness, opaqueness, water repellency and dispersibility.

L'invention concerne une composition chimique s'utilisant dans un procédé de fabrication d'un papier présentant des caractéristiques améliorées de brillance, d'opacité et d'encollage. L'invention concerne également le procédé d'utilisation de ladite composition dans la fabrication du papier, ainsi que le papier obtenu au moyen dudit procédé. La compositoin utilise une base adoucissante cationique, telle que les mono et distéaramides d'aminoéthyléthanolamine, afin d'améliorer l'encollage, l'opacité et la brillance. Un tensioactif, tel qu'une amine de suif éthoxylée ou le produit réactionnel d'un saccharide et d'un acide, s'utilise afin de maintenir la dispersion des constituants dans la composition et de réaliser une dispersibilité uniforme de ladite composition sur le papier. Un autre mode de réalisation combine un adoucissant amphotère, tel qu'un sel d'un dérivé amphotère d'acide stéarique, la base adoucissante cationique, un acide, tel que de l'acide acétique, un tensioactif, tel qu'une amine de suif POE (15), de la carbamide et de l'eau. On peut ajouter à la composition, afin d'accélérer sa préparation, un agent de régulation de la viscosité, tel que chlorure de sodium ou acétate de sodium. On ajoute la composition à la pâte à papier liquide pendant la fabrication du papier, ce qui confère à ce dernier d'excellentes qualités de brillance, d'opacité, d'imperméabilité et de dispersibilité.

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